Operation Highjump is severely in the conspiracy theory category, and thus you would not rely at all on what is in wikipedia.
Find the old footage of Admiral Byrd talking about what they found down there. And then... nothing.
Further, just after this, ALL of the nations signed a treaty that Antarctica is off limits to everyone. You have to get permission to even drive a boat around down there.
And yes, there is stories about making it to the south pole. I believe they are purely works of fiction. If they were real, then operation Highjump wouldn't have quit 6 months into its 3 year plan. Admiral Byrd had crossed the Arctic plenty of times.
There are no plane flights across Antarctica. There are lots of plane flights across the Arctic.
Antarctica is an enigma. Hitler sent lots of troops down there. The US later sent lots of troops down there. We don't know anything about Antarctica except what the lying liars that lie tell us.
Since we don't know, its just more pieces to store away till a later date.
Remember, all we have is NASA, a known group of lying liars that lie, telling us that the earth is a ball. Besides that, there is no evidence that the earth is a ball.
Satellites are used as one of the "explanations" for the earth being a ball... but we actually do not know anything about satellites. Only what they tell us. And what they tell us, doesn't add up.